Sequencer Port Subscription

Collaboration diagram for Sequencer Port Subscription:

Macros
#define	snd_seq_port_subscribe_alloca(ptr)    __snd_alloca(ptr, snd_seq_port_subscribe)
#define	snd_seq_query_subscribe_alloca(ptr)    __snd_alloca(ptr, snd_seq_query_subscribe)

Typedefs
typedef struct _snd_seq_port_subscribe	snd_seq_port_subscribe_t
typedef struct _snd_seq_query_subscribe	snd_seq_query_subscribe_t

Enumerations
enum	snd_seq_query_subs_type_t { SND_SEQ_QUERY_SUBS_READ , SND_SEQ_QUERY_SUBS_WRITE }

Functions
size_t	snd_seq_port_subscribe_sizeof (void)
	get size of snd_seq_port_subscribe_t
int	snd_seq_port_subscribe_malloc (snd_seq_port_subscribe_t **ptr)
	allocate an empty snd_seq_port_subscribe_t using standard malloc
void	snd_seq_port_subscribe_free (snd_seq_port_subscribe_t *ptr)
	frees a previously allocated snd_seq_port_subscribe_t
void	snd_seq_port_subscribe_copy (snd_seq_port_subscribe_t *dst, const snd_seq_port_subscribe_t *src)
	copy one snd_seq_port_subscribe_t to another
const snd_seq_addr_t *	snd_seq_port_subscribe_get_sender (const snd_seq_port_subscribe_t *info)
	Get sender address of a port_subscribe container.
const snd_seq_addr_t *	snd_seq_port_subscribe_get_dest (const snd_seq_port_subscribe_t *info)
	Get destination address of a port_subscribe container.
int	snd_seq_port_subscribe_get_queue (const snd_seq_port_subscribe_t *info)
	Get the queue id of a port_subscribe container.
int	snd_seq_port_subscribe_get_exclusive (const snd_seq_port_subscribe_t *info)
	Get the exclusive mode of a port_subscribe container.
int	snd_seq_port_subscribe_get_time_update (const snd_seq_port_subscribe_t *info)
	Get the time-update mode of a port_subscribe container.
int	snd_seq_port_subscribe_get_time_real (const snd_seq_port_subscribe_t *info)
	Get the real-time update mode of a port_subscribe container.
void	snd_seq_port_subscribe_set_sender (snd_seq_port_subscribe_t *info, const snd_seq_addr_t *addr)
	Set sender address of a port_subscribe container.
void	snd_seq_port_subscribe_set_dest (snd_seq_port_subscribe_t *info, const snd_seq_addr_t *addr)
	Set destination address of a port_subscribe container.
void	snd_seq_port_subscribe_set_queue (snd_seq_port_subscribe_t *info, int q)
	Set the queue id of a port_subscribe container.
void	snd_seq_port_subscribe_set_exclusive (snd_seq_port_subscribe_t *info, int val)
	Set the exclusive mode of a port_subscribe container.
void	snd_seq_port_subscribe_set_time_update (snd_seq_port_subscribe_t *info, int val)
	Set the time-update mode of a port_subscribe container.
void	snd_seq_port_subscribe_set_time_real (snd_seq_port_subscribe_t *info, int val)
	Set the real-time mode of a port_subscribe container.
int	snd_seq_get_port_subscription (snd_seq_t *handle, snd_seq_port_subscribe_t *sub)
	obtain subscription information
int	snd_seq_subscribe_port (snd_seq_t *handle, snd_seq_port_subscribe_t *sub)
	subscribe a port connection
int	snd_seq_unsubscribe_port (snd_seq_t *handle, snd_seq_port_subscribe_t *sub)
	unsubscribe a connection between ports
size_t	snd_seq_query_subscribe_sizeof (void)
	get size of snd_seq_query_subscribe_t
int	snd_seq_query_subscribe_malloc (snd_seq_query_subscribe_t **ptr)
	allocate an empty snd_seq_query_subscribe_t using standard malloc
void	snd_seq_query_subscribe_free (snd_seq_query_subscribe_t *ptr)
	frees a previously allocated snd_seq_query_subscribe_t
void	snd_seq_query_subscribe_copy (snd_seq_query_subscribe_t *dst, const snd_seq_query_subscribe_t *src)
	copy one snd_seq_query_subscribe_t to another
int	snd_seq_query_subscribe_get_client (const snd_seq_query_subscribe_t *info)
	Get the client id of a query_subscribe container.
int	snd_seq_query_subscribe_get_port (const snd_seq_query_subscribe_t *info)
	Get the port id of a query_subscribe container.
const snd_seq_addr_t *	snd_seq_query_subscribe_get_root (const snd_seq_query_subscribe_t *info)
	Get the client/port address of a query_subscribe container.
snd_seq_query_subs_type_t	snd_seq_query_subscribe_get_type (const snd_seq_query_subscribe_t *info)
	Get the query type of a query_subscribe container.
int	snd_seq_query_subscribe_get_index (const snd_seq_query_subscribe_t *info)
	Get the index of subscriber of a query_subscribe container.
int	snd_seq_query_subscribe_get_num_subs (const snd_seq_query_subscribe_t *info)
	Get the number of subscriptions of a query_subscribe container.
const snd_seq_addr_t *	snd_seq_query_subscribe_get_addr (const snd_seq_query_subscribe_t *info)
	Get the address of subscriber of a query_subscribe container.
int	snd_seq_query_subscribe_get_queue (const snd_seq_query_subscribe_t *info)
	Get the queue id of subscriber of a query_subscribe container.
int	snd_seq_query_subscribe_get_exclusive (const snd_seq_query_subscribe_t *info)
	Get the exclusive mode of a query_subscribe container.
int	snd_seq_query_subscribe_get_time_update (const snd_seq_query_subscribe_t *info)
	Get the time-update mode of a query_subscribe container.
int	snd_seq_query_subscribe_get_time_real (const snd_seq_query_subscribe_t *info)
	Get the real-time update mode of a query_subscribe container.
void	snd_seq_query_subscribe_set_client (snd_seq_query_subscribe_t *info, int client)
	Set the client id of a query_subscribe container.
void	snd_seq_query_subscribe_set_port (snd_seq_query_subscribe_t *info, int port)
	Set the port id of a query_subscribe container.
void	snd_seq_query_subscribe_set_root (snd_seq_query_subscribe_t *info, const snd_seq_addr_t *addr)
	Set the client/port address of a query_subscribe container.
void	snd_seq_query_subscribe_set_type (snd_seq_query_subscribe_t *info, snd_seq_query_subs_type_t type)
	Set the query type of a query_subscribe container.
void	snd_seq_query_subscribe_set_index (snd_seq_query_subscribe_t *info, int _index)
	Set the subscriber's index to be queried.
int	snd_seq_query_port_subscribers (snd_seq_t *seq, snd_seq_query_subscribe_t *subs)
	query port subscriber list

Detailed Description

Sequencer Port Subscription

Macro Definition Documentation

snd_seq_port_subscribe_alloca

#define snd_seq_port_subscribe_alloca

(

ptr

)

__snd_alloca(ptr, snd_seq_port_subscribe)

allocate a snd_seq_port_subscribe_t container on stack

snd_seq_query_subscribe_alloca

#define snd_seq_query_subscribe_alloca

(

ptr

)

__snd_alloca(ptr, snd_seq_query_subscribe)

allocate a snd_seq_query_subscribe_t container on stack

Typedef Documentation

snd_seq_port_subscribe_t

typedef struct _snd_seq_port_subscribe snd_seq_port_subscribe_t

port subscription container

snd_seq_query_subscribe_t

typedef struct _snd_seq_query_subscribe snd_seq_query_subscribe_t

subscription query container

Enumeration Type Documentation

snd_seq_query_subs_type_t

enum snd_seq_query_subs_type_t

type of query subscription

Enumerator
SND_SEQ_QUERY_SUBS_READ	query read subscriptions
SND_SEQ_QUERY_SUBS_WRITE	query write subscriptions

Function Documentation

snd_seq_get_port_subscription()

int snd_seq_get_port_subscription	(	snd_seq_t *	seq,
		snd_seq_port_subscribe_t *	sub
	)

obtain subscription information

Parameters

seq	sequencer handle
sub	pointer to return the subscription information

Returns

0 on success otherwise a negative error code

See also

snd_seq_subscribe_port(), snd_seq_query_port_subscribers()

snd_seq_port_subscribe_copy()

void snd_seq_port_subscribe_copy	(	snd_seq_port_subscribe_t *	dst,
		const snd_seq_port_subscribe_t *	src
	)

copy one snd_seq_port_subscribe_t to another

Parameters

dst	pointer to destination
src	pointer to source

snd_seq_port_subscribe_free()

void snd_seq_port_subscribe_free

(

snd_seq_port_subscribe_t *

obj

)

frees a previously allocated snd_seq_port_subscribe_t

Parameters

obj	pointer to object to free

snd_seq_port_subscribe_get_dest()

const snd_seq_addr_t * snd_seq_port_subscribe_get_dest

(

const snd_seq_port_subscribe_t *

info

)

Get destination address of a port_subscribe container.

Parameters

info	port_subscribe container

See also

snd_seq_subscribe_port(), snd_seq_port_subscribe_set_dest()

snd_seq_port_subscribe_get_exclusive()

int snd_seq_port_subscribe_get_exclusive

(

const snd_seq_port_subscribe_t *

info

)

Get the exclusive mode of a port_subscribe container.

Parameters

info	port_subscribe container

Returns

1 if exclusive mode

See also

snd_seq_subscribe_port(), snd_seq_port_subscribe_set_exclusive()

snd_seq_port_subscribe_get_queue()

int snd_seq_port_subscribe_get_queue

(

const snd_seq_port_subscribe_t *

info

)

Get the queue id of a port_subscribe container.

Parameters

info	port_subscribe container

Returns

queue id

See also

snd_seq_subscribe_port(), snd_seq_port_subscribe_set_queue()

snd_seq_port_subscribe_get_sender()

const snd_seq_addr_t * snd_seq_port_subscribe_get_sender

(

const snd_seq_port_subscribe_t *

info

)

Get sender address of a port_subscribe container.

Parameters

info	port_subscribe container

See also

snd_seq_subscribe_port(), snd_seq_port_subscribe_set_sender()

snd_seq_port_subscribe_get_time_real()

int snd_seq_port_subscribe_get_time_real

(

const snd_seq_port_subscribe_t *

info

)

Get the real-time update mode of a port_subscribe container.

Parameters

info	port_subscribe container

Returns

1 if real-time update mode

See also

snd_seq_subscribe_port(), snd_seq_port_subscribe_set_time_real()

snd_seq_port_subscribe_get_time_update()

int snd_seq_port_subscribe_get_time_update

(

const snd_seq_port_subscribe_t *

info

)

Get the time-update mode of a port_subscribe container.

Parameters

info	port_subscribe container

Returns

1 if update timestamp

See also

snd_seq_subscribe_port(), snd_seq_port_subscribe_set_time_update()

snd_seq_port_subscribe_malloc()

int snd_seq_port_subscribe_malloc

(

snd_seq_port_subscribe_t **

ptr

)

allocate an empty snd_seq_port_subscribe_t using standard malloc

Parameters

ptr	returned pointer

Returns

0 on success otherwise negative error code

snd_seq_port_subscribe_set_dest()

void snd_seq_port_subscribe_set_dest	(	snd_seq_port_subscribe_t *	info,
		const snd_seq_addr_t *	addr
	)

Set destination address of a port_subscribe container.

Parameters

info	port_subscribe container
addr	destination address

See also

snd_seq_subscribe_port(), snd_seq_port_subscribe_get_dest()

snd_seq_port_subscribe_set_exclusive()

void snd_seq_port_subscribe_set_exclusive	(	snd_seq_port_subscribe_t *	info,
		int	val
	)

Set the exclusive mode of a port_subscribe container.

Parameters

info	port_subscribe container
val	non-zero to enable

See also

snd_seq_subscribe_port(), snd_seq_port_subscribe_get_exclusive()

snd_seq_port_subscribe_set_queue()

void snd_seq_port_subscribe_set_queue	(	snd_seq_port_subscribe_t *	info,
		int	q
	)

Set the queue id of a port_subscribe container.

Parameters

info	port_subscribe container
q	queue id

See also

snd_seq_subscribe_port(), snd_seq_port_subscribe_get_queue()

snd_seq_port_subscribe_set_sender()

void snd_seq_port_subscribe_set_sender	(	snd_seq_port_subscribe_t *	info,
		const snd_seq_addr_t *	addr
	)

Set sender address of a port_subscribe container.

Parameters

info	port_subscribe container
addr	sender address

See also

snd_seq_subscribe_port(), snd_seq_port_subscribe_get_sender()

snd_seq_port_subscribe_set_time_real()

void snd_seq_port_subscribe_set_time_real	(	snd_seq_port_subscribe_t *	info,
		int	val
	)

Set the real-time mode of a port_subscribe container.

Parameters

info	port_subscribe container
val	non-zero to enable

See also

snd_seq_subscribe_port(), snd_seq_port_subscribe_get_time_real()

snd_seq_port_subscribe_set_time_update()

void snd_seq_port_subscribe_set_time_update	(	snd_seq_port_subscribe_t *	info,
		int	val
	)

Set the time-update mode of a port_subscribe container.

Parameters

info	port_subscribe container
val	non-zero to enable

See also

snd_seq_subscribe_port(), snd_seq_port_subscribe_get_time_update()

snd_seq_port_subscribe_sizeof()

size_t snd_seq_port_subscribe_sizeof

(

void

)

get size of snd_seq_port_subscribe_t

Returns

size in bytes

snd_seq_query_port_subscribers()

int snd_seq_query_port_subscribers	(	snd_seq_t *	seq,
		snd_seq_query_subscribe_t *	subs
	)

query port subscriber list

Parameters

seq	sequencer handle
subs	subscription to query

Returns

0 on success otherwise a negative error code

Queries the subscribers accessing to a port. The query information is specified in subs argument.

At least, the client id, the port id, the index number and the query type must be set to perform a proper query. As the query type, SND_SEQ_QUERY_SUBS_READ or SND_SEQ_QUERY_SUBS_WRITE can be specified to check whether the readers or the writers to the port. To query the first subscription, set 0 to the index number. To list up all the subscriptions, call this function with the index numbers from 0 until this returns a negative value.

See also

snd_seq_get_port_subscription()

snd_seq_query_subscribe_copy()

void snd_seq_query_subscribe_copy	(	snd_seq_query_subscribe_t *	dst,
		const snd_seq_query_subscribe_t *	src
	)

copy one snd_seq_query_subscribe_t to another

Parameters

dst	pointer to destination
src	pointer to source

snd_seq_query_subscribe_free()

void snd_seq_query_subscribe_free

(

snd_seq_query_subscribe_t *

obj

)

frees a previously allocated snd_seq_query_subscribe_t

Parameters

obj	pointer to object to free

snd_seq_query_subscribe_get_addr()

const snd_seq_addr_t * snd_seq_query_subscribe_get_addr

(

const snd_seq_query_subscribe_t *

info

)

Get the address of subscriber of a query_subscribe container.

Parameters

info	query_subscribe container

Returns

subscriber's address pointer

See also

snd_seq_query_port_subscribers()

snd_seq_query_subscribe_get_client()

int snd_seq_query_subscribe_get_client

(

const snd_seq_query_subscribe_t *

info

)

Get the client id of a query_subscribe container.

Parameters

info	query_subscribe container

Returns

client id

See also

snd_seq_query_port_subscribers(), snd_seq_query_subscribe_set_client()

snd_seq_query_subscribe_get_exclusive()

int snd_seq_query_subscribe_get_exclusive

(

const snd_seq_query_subscribe_t *

info

)

Get the exclusive mode of a query_subscribe container.

Parameters

info	query_subscribe container

Returns

1 if exclusive mode

See also

snd_seq_query_port_subscribers()

snd_seq_query_subscribe_get_index()

int snd_seq_query_subscribe_get_index

(

const snd_seq_query_subscribe_t *

info

)

Get the index of subscriber of a query_subscribe container.

Parameters

info	query_subscribe container

Returns

subscriber's index

See also

snd_seq_query_port_subscribers(), snd_seq_query_subscribe_set_index()

snd_seq_query_subscribe_get_num_subs()

int snd_seq_query_subscribe_get_num_subs

(

const snd_seq_query_subscribe_t *

info

)

Get the number of subscriptions of a query_subscribe container.

Parameters

info	query_subscribe container

Returns

number of subscriptions

See also

snd_seq_query_port_subscribers()

snd_seq_query_subscribe_get_port()

int snd_seq_query_subscribe_get_port

(

const snd_seq_query_subscribe_t *

info

)

Get the port id of a query_subscribe container.

Parameters

info	query_subscribe container

Returns

port id

See also

snd_seq_query_port_subscribers(), snd_seq_query_subscribe_set_port()

snd_seq_query_subscribe_get_queue()

int snd_seq_query_subscribe_get_queue

(

const snd_seq_query_subscribe_t *

info

)

Get the queue id of subscriber of a query_subscribe container.

Parameters

info	query_subscribe container

Returns

subscriber's queue id

See also

snd_seq_query_port_subscribers()

snd_seq_query_subscribe_get_root()

const snd_seq_addr_t * snd_seq_query_subscribe_get_root

(

const snd_seq_query_subscribe_t *

info

)

Get the client/port address of a query_subscribe container.

Parameters

info	query_subscribe container

Returns

client/port address pointer

See also

snd_seq_query_port_subscribers(), snd_seq_query_subscribe_set_root()

snd_seq_query_subscribe_get_time_real()

int snd_seq_query_subscribe_get_time_real

(

const snd_seq_query_subscribe_t *

info

)

Get the real-time update mode of a query_subscribe container.

Parameters

info	query_subscribe container

Returns

1 if real-time update mode

See also

snd_seq_query_port_subscribers()

snd_seq_query_subscribe_get_time_update()

int snd_seq_query_subscribe_get_time_update

(

const snd_seq_query_subscribe_t *

info

)

Get the time-update mode of a query_subscribe container.

Parameters

info	query_subscribe container

Returns

1 if update timestamp

See also

snd_seq_query_port_subscribers()

snd_seq_query_subscribe_get_type()

snd_seq_query_subs_type_t snd_seq_query_subscribe_get_type

(

const snd_seq_query_subscribe_t *

info

)

Get the query type of a query_subscribe container.

Parameters

info	query_subscribe container

Returns

query type

See also

snd_seq_query_port_subscribers(), snd_seq_query_subscribe_set_type()

snd_seq_query_subscribe_malloc()

int snd_seq_query_subscribe_malloc

(

snd_seq_query_subscribe_t **

ptr

)

allocate an empty snd_seq_query_subscribe_t using standard malloc

Parameters

ptr	returned pointer

Returns

0 on success otherwise negative error code

snd_seq_query_subscribe_set_client()

void snd_seq_query_subscribe_set_client	(	snd_seq_query_subscribe_t *	info,
		int	client
	)

Set the client id of a query_subscribe container.

Parameters

info	query_subscribe container
client	client id

See also

snd_seq_query_port_subscribers(), snd_seq_query_subscribe_get_client()

snd_seq_query_subscribe_set_index()

void snd_seq_query_subscribe_set_index	(	snd_seq_query_subscribe_t *	info,
		int	index
	)

Set the subscriber's index to be queried.

Parameters

info	query_subscribe container
index	index to be queried

See also

snd_seq_query_port_subscribers(), snd_seq_query_subscribe_get_index()

snd_seq_query_subscribe_set_port()

void snd_seq_query_subscribe_set_port	(	snd_seq_query_subscribe_t *	info,
		int	port
	)

Set the port id of a query_subscribe container.

Parameters

info	query_subscribe container
port	port id

See also

snd_seq_query_port_subscribers(), snd_seq_query_subscribe_get_port()

snd_seq_query_subscribe_set_root()

void snd_seq_query_subscribe_set_root	(	snd_seq_query_subscribe_t *	info,
		const snd_seq_addr_t *	addr
	)

Set the client/port address of a query_subscribe container.

Parameters

info	query_subscribe container
addr	client/port address pointer

See also

snd_seq_query_port_subscribers(), snd_seq_query_subscribe_get_root()

snd_seq_query_subscribe_set_type()

void snd_seq_query_subscribe_set_type	(	snd_seq_query_subscribe_t *	info,
		snd_seq_query_subs_type_t	type
	)

Set the query type of a query_subscribe container.

Parameters

info	query_subscribe container
type	query type

See also

snd_seq_query_port_subscribers(), snd_seq_query_subscribe_get_type()

snd_seq_query_subscribe_sizeof()

size_t snd_seq_query_subscribe_sizeof

(

void

)

get size of snd_seq_query_subscribe_t

Returns

size in bytes

snd_seq_subscribe_port()

int snd_seq_subscribe_port	(	snd_seq_t *	seq,
		snd_seq_port_subscribe_t *	sub
	)

subscribe a port connection

Parameters

seq	sequencer handle
sub	subscription information

Returns

0 on success otherwise a negative error code

Subscribes a connection between two ports. The subscription information is stored in sub argument.

See also

snd_seq_get_port_subscription(), snd_seq_unsubscribe_port(), snd_seq_connect_from(), snd_seq_connect_to()

snd_seq_unsubscribe_port()

int snd_seq_unsubscribe_port	(	snd_seq_t *	seq,
		snd_seq_port_subscribe_t *	sub
	)

unsubscribe a connection between ports

Parameters

seq	sequencer handle
sub	subscription information to disconnect

Returns

0 on success otherwise a negative error code

Unsubscribes a connection between two ports, described in sender and dest fields in sub argument.

See also

snd_seq_subscribe_port(), snd_seq_disconnect_from(), snd_seq_disconnect_to()